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MushMaster
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Do any of you have experience in soldering Platinum Plus? If so, what solder do you use and at what propane/oxygen ratio? Thanks in advance!
Do any of you have experience in soldering Platinum Plus? If so, what solder do you use and at what propane/oxygen ratio? Thanks in advance!
i inquired about this with the techs at Argen, they make a Co,Cr solder for pre soldering & they said to use a non borax, water soluble flux.Do any of you have experience in soldering Platinum Plus? If so, what solder do you use and at what propane/oxygen ratio? Thanks in advance!
Might need a different investment. It may not have an expansion window that encompases the CTE of that metal at casting temps.i inquired about this with the techs at Argen, they make a Co,Cr solder for pre soldering & they said to use a non borax, water soluble flux.
just curious, how do your casting fit?
My problem was not getting enough expansion on castings , they were way too tight even using straight liquid & increasing mixing times.
Thanks
Without diverging too far from the topic of this thread, we have the exact same findings here. We use Sherafina investment material with 100% expansion liquid and 4 ml less total liquid. (For Platinum Plus that is). At that point the fit is beautiful. Instead of increasing mixing times, perhaps you will find a better fit with keeping the same mixing times, just using a little less total liquid as well. Like JMN mentioned (for which thanks) we may try and use a different investment for the sake of getting more expansion closer to the recommended liquid/water ratio.i inquired about this with the techs at Argen, they make a Co,Cr solder for pre soldering & they said to use a non borax, water soluble flux.
just curious, how do your casting fit?
My problem was not getting enough expansion on castings , they were way too tight even using straight liquid & increasing mixing times.
Thanks
JMN,yes, I have that sheet for the alloy too, it just says use a phosphate investment but offers no specific brand that they might have had success with.Might need a different investment. It may not have an expansion window that encompases the CTE of that metal at casting temps.
AmsterDan,Without diverging too far from the topic of this thread, we have the exact same findings here. We use Sherafina investment material with 100% expansion liquid and 4 ml less total liquid. (For Platinum Plus that is). At that point the fit is beautiful. Instead of increasing mixing times, perhaps you will find a better fit with keeping the same mixing times, just using a little less total liquid as well. Like JMN mentioned (for which thanks) we may try and use a different investment for the sake of getting more expansion closer to the recommended liquid/water ratio.
I will look into our solder and flux combo tomorrow. Currently experimenting with it and have a hard time getting the solder to flow. As it stands now we end up with a beautiful piece of oxidized modern art; just not a beautiful piece of soldered bridge structure ... yet! So if anyone has more experience, one and all ear here!
Keep on mind my metal casting days are about 5 years behind me, OK?JMN,yes, I have that sheet for the alloy too, it just says use a phosphate investment but offers no specific brand that they might have had success with.
I made a casting with platinum plus using DVA’s Cream press & another casting with Jensen Microstar.
both castings were so small they were unusable.
can you please offer a suggestion for an investment which offers more expansion or how to go about choosing the proper investment for this alloy? I’ve tried everything the & investment manufacturers have suggested.
Thanks again